No, that part is saying that Superman without our Sun is a normal person without any powers, while Batman is still a badass without his money and batsuit. It's not saying to move the Sun from the situation where they f!ght each other, Batman doesn't need to do that nor is it possible. All Batman needs is Kryptonite. My only problem with this is that the world isn't littered with Kryptonite, so it's not easy for Bat to obtain it. The only way Bat could beat either of these 2 is if they schedule a f!ght in advance, otherwise he's getting his a.ss kicked. He might randomly have an emp grenade on him but I doubt he has Kryptonite in his belt